state law allows him to do that as well as running for the vice presidency, but what challenges does that present? >> it's just that it can look bad. but i would also point out that joe biden also was running for re-election for the senate in delaware when he was brarack obama's running mate four years ago. so this is a pretty commonplace thing to do. >> all right, matt visor from "the boston globe" and erin mcpike from real clear politics, thank you both. >> thank you. >>> coming up, new polls out today show mitt romney with a double-digit deficit in his running mate's home state. we will give you the latest spread on that. >>> but first, which president obama is preparing to emerge at the next debate? we'll talk to his campaign's vice chairwoman, next. this is msnbc. ♪ most paints have color that sits on the surface. but nothing beats benjamin moore's color lock technology that locks color right in, no matter how often you wash it. color lock technology. exclusively from your benjamin moore retailer. find your perfect color with a buy one, get one pint offer. visit benjaminmoore.